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Inventories
9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Inventories Inventories. Inventories at September 30, 2018 and December 31, 2017, consisted of the following (in thousands):
September 30, December 31, 
2018 2017 
Finished goods $103,258 $86,555 
Work-in-process 20,546 12,799 
Raw materials 57,635 55,934 
Total Inventories $181,439 $155,288